MERCEDES-BENZ G500 2002 W463 Owner's Manual

248 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Switching transfer case
Switching from “HIGH” to “LOW”:
•The shift procedure can only be performed with the
engine running.
•The vehicle speed must not exceed 25 mph
(40 km / h).
•Move selector lever for the automatic transmission
to position “N”, see page 207.
Press the “LOW” switch (1).
Once the shift is complete, the gear position “L” is
displayed in the transfer case indicator (3).
If the multifunction display shows the message
“TC SHIFT CONDITIONS NOT FULFILLED”, the shift
does not occur.
At least one shif t con dition was n ot me t. Repe at t he shif t
procedure.
Note:
Do not depress the accelerator when switching the
automatic transmission from position “N” to “D”.If the multifunction display shows the message
“TC IN NEUTRAL”, the shift does not occur.
The transfer case is in neutral. The gear position “N” is
displayed in the transfer case indicator (3). Repeat the
shift procedure.
If the multifunction display shows the message
“TC SHIFT – CANCELLED”, the shift did not take place.
Repeat the shift procedure.
If the multifunction display shows the message
“TRANSFER CASE – VISIT WORKSHOP!”, there is a
malfunction in the system.
Have the vehicle checked at your authorized Mercedes-
Benz Light Truck Center as soon as possible.
For malfunction and warning messages in the
multifunction display, see page 272.
Wa r n i n g !
If TC is in neutral, the “P” position of transmission
will not hold vehicle. The parking brake must be
applied to hold vehicle in place.
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249 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Note:
If the electronic key is in starter switch position 0 or 1,
an alarm will sound if the transfer case is in
position “N” and the drivers door is opened.
Engage transfer case to gear position “HIGH” or “LOW”.Switching from “LOW” to “HIGH”:
•The shift procedure can only be performed with the
engine running.
•The vehicle speed must not exceed 40 mph
(70 km / h).
•Move selector lever for the automatic transmission
to position “N”, see page 207.
Press the “HIGH” switch (2).
Once the shift is complete, the gear position “H” is
displayed in the transfer case indicator (3).
If the multifunction display shows the message
“TC SHIFT CONDITIONS NOT FULFILLED”, the shift
does not occur.
At least on e s hif t co nd ition was not m et. Rep eat t he s hif t
procedure.
Note:
Do not depress the accelerator when switching the
automatic transmission from position “N” to “D”.
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250 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
If the multifunction display shows the message
“TC IN NEUTRAL”, the shift does not occur.
The transfer case is in neutral. The gear position “N” is
displayed in the transfer case indicator (3). Repeat the
shift procedure.
If the multifunction display shows the message
“TC SHIFT – CANCELLED”, the shift did not take place.
Repeat the shift procedure.
If the multifunction display shows the message
“TRANSFER CASE – VISIT WORKSHOP!”, there is a
malfunction in the system.
Have the vehicle checked at your authorized Mercedes-
Benz Light Truck Center as soon as possible.
For malfunction and warning messages in the
multifunction display, see page 272.Note:
If the electronic key is in starter switch position 0 or 1,
an alarm will sound if the transfer case is in
position “N” and the drivers door is opened.
Engage transfer case to gear position “HIGH” or “LOW”.
Wa r n i n g !
If TC is in neutral, the “P” position of transmission
will not hold vehicle. The parking brake must be
applied to hold vehicle in place.
J_G463.book Seite 250 Mittwoch, 19. September 2001 8:06 08

251 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index A few words about differentials and differential
locks
When a vehicle negotiates a turn, wheels on the outside
of the curve must travel farther and rotate faster than
the inside wheels. The differential, the operation of a set
of gears that allow the powered wheels in a vehicle to
turn a different speeds, provides for this essential
function.
The drawback is that the differential also sends most of
the engine's power to the wheel with the least load or
strain on it. For example, if one of a vehicle's powered
wheels sits on a patch of snow and spins because there
is no traction, all of the engine's power will go to that
wheel because the power will take the path of least
resistance. Meanwhile, the opposite wheel, sitting on
dry pavement where it could get enough grip to start the
vehicle moving, sits idle because it gets no power.
The Electronic Traction System (ETS) addresses this
problem and provides for good control and steering
ability by automatically slowing the slipping wheel and
thus increasing the power to the other non-slipping
d rive whee ls to get t he ve hicle m ovin g. The ESP and ETS
in this vehicle feature such intelligent limited-slip
differential technology, ideally suited for on-road and light off-road driving. The position “LOW” of the
transfer case (see pages 247and 226) also enhances
off-road driving capabilities.
More extreme off-road conditions may call for another
cure which is to engage a differential lock, preventing
the differential from operating altogether. This vehicle
offers as standard equipment three differential locks:
front, transfer case (center), and rear. Each can be
engaged simply by pushing a dashboard-mounted
button (see pages 253 and 254 for engaging differential
locks). When the transfer case (center) differential is
locked, half of the engine's power is automatically
distributed to the front wheels and half to the rear
wheels. When the rear differential is locked, power
going to the rear wheels is equally distributed, so that
both rear wheels turn at the same speed and torque.
When the front differential is locked, all four wheels
now turn with equal power and torque. Please be aware
that engaging the differential locks will significantly
reduce steering ability of the vehicle.
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252 Driving systems
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data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
It is important to understand that during on-road/paved
driving, differentials are absolutely required to provide
essential control and steering ability of the vehicle. The
differential locks, therefore, must not be engaged when
driving on paved roads and should only be used when
and to the extent necessary to negotiate off-road
conditions not addressable by the systems (automatic
ETS, ESP; manual switch position “LOW” of transfer-
case) this vehicle comes equipped with.
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253 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Differential locks
The switch is located in the center console.
1Transfer case (center) differential lock
2Rear axle differential lock
3Front differential lock
4Engagement indicator lamps (yellow)
5Function indicator lamp (red)6 The ESP, BAS and ABS are switched off
The differential locks can only be switched on in the
following sequence.
•Transfer case differential lock
•Rear axle differential lock
•Front differential lock
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254 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Important!
Do not engage the front axle differential lock when
driving around tight corners as steering ability is
restricted.
When the transfer case differential lock is activated, the
ESP, ABS and BAS are automatically switched off.
The ABS malfunction indicator lamp and the ESP
warning lamp in the instrument cluster come on.
Further appear alternately the messages “ESP NOT
ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE –
LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK
ACTIVE” in the multifunction display.
The differential locks should be engaged when driving
off-road, for example:
•for driving trough water or
•when driving on deep snow, icy or fouled surfaces.
For notes on off-road driving, see page 226.To engage differential locks:
Important!
To avoid damage to the transfer case and differential
locks:
• Engage differential locks only at low speed
(walking speed, not more than 5 mph).
• Do not engage differential locks if the driving
wheels are spinning.
Wa r n i n g !
Never drive on pavement with activated differential
locks.
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255 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Briefly press the switch for the differential lock
required. The corresponding engagement indicator
lamp (4) comes on.
The ESP warning lamp in the instrument cluster comes
on and the message “ESP NOT ACTIVE – LOCK
SELECTED” appears.The function indicator lamp (5) comes on when the
differential lock engagement procedure has been
completed. The ABS malfunction indicator lamp and the
ESP warning lamp in the instrument cluster come on.
Further appear alternately the messages “ESP NOT
ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE –
LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK
ACTIVE” in the multifunction display.
Only apply the accelerator lightly when driving off.
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256 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
Methods to disengage differential locks
There are two different methods to disengage
differential locks:
•Disengage differential locks in reverse order. When
the rear axle differential lock is disengaged, the
front axle differential lock is automatically
disengaged with it.
Briefly press the previously activated switches for
the differential lock. The correspondending
engagement indicator lamp (4) goes out.
•If the transfer case differential lock is disengaged,
all other differential locks are automatically
disengaged.
Briefly press the switch (1) for the transfer case
differential lock. The engagement indicator
lamps (4) go out.
The function indicator lamp (5) goes out when the
disengagement procedure has been completed.Only when all function indicator lamps (5) have gone
out, the ABS malfunction indicator lamp and the ESP
warning lamp in the instrument cluster go out and the
messages “ESP NOT ACTIVE – LOCK ACTIVE”, “BAS
NOT AVAILABLE – LOCK ACTIVE” and “ABS NOT
ACTIVE – LOCK ACTIVE” in the multifunction display
disappear.
Now the message “ESP – NOT AVAILABLE” appears in
the multifunction display and the ESP warning lamp
comes on. That means the ESP, BAS and ABS functions
are not active yet.
To activate the systems again drive for 3 seconds with a
constant drive behavior.
Note:
If the function lamps do not go out when the differential
locks are disengaged, make minor changes to the
vehicles direction.
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257 Driving systems
Te ch n i c a l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Important!
When running on a (single-axle) dynamometer – no
matter how briefly – the non driven axle must be
raised or its drive shaft disconnected. The transfer
differential lock must be engaged. Otherwise the
transfer case can be damaged, which is not covered
by the Mercedes-Benz Limited Warranty.
Wa r n i n g !
Never drive on pavement with activated differential
locks.Steering control will be strongly affected with the
front differential lock activated.ABS, BAS and ESP are switched off automatically
when the transfer case differential lock is
activated.
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